Car-wheel lathe.



A. 0,. STEBB'INS & W. 18mm.

UAR WHEEL LATHE. APPLICATION FILED NOV. 1a, 1909.

Patented Mar. 15, 1910..

Inventor 5 ma i5 9&-

Witnesses:

UNITED STATES PATENT OFFICE.

ALBERT C. STEEBINS, OF PLAINFIELD, NEVJ JERSEY, AND \VILLARI) T. SEARS,OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO NILES-BEMENT-POND COMPANY,

OF JERSEY CITY, NEW JERSEY.

CAR-WHEEL LATHE.

T 0 all whom it may concern.

Be it known that we, ALBERT C. STEBBINS, of Plainfield, Union county,New Jersey, and TVILLARD T. SEARS, of Philadelphia, Philadelphia county,Pennsylvania, have invented certain new and useful Improvements inCar-VVheel Lathes, of which the following is a specification.

This invention relating to improvements in lat-hes for employment in theturning of car wheels while fast upon their axles, will be readilyunderstood from the following description taken in connection with theaccompanying drawing, in which Figure 1 is a rear elevation of a latheembodying our invention: Fig. 2 is a vertical longitudinal section ofone of the tailstocks: and Fig. 3 an elevation of the inner face of oneof the tailstocks.

There is a class of car wheel lathes in which a hollow lathe arborsurrounds the car axle between the wheels and is provided on each endwith drivers engaging the wheels, the arbor and its bearing being 1011-gitudinally slotted to permit the entrance and exit of the axle,tailstocks being provided to furnish bearings for the journals of theaxle projecting outwardly from the wheels, as illustrated, for instance,in United States Patent N 0. 312,615.

The present invention relates to improvements in the tailstocks, theimprovements being designed to facilitate the placing and removal of thework in the lathe and to give superior stability to the tail-stockbearings which engage the journals of the axle.

In the drawing :-1, indicates the lathe bed: 2, the headstock mountedthereon: 3, the longitudinal gap in the headstock to perinit thetransverse passage of the axle: 4, the arbor journaled in the headstockand also longitudinally gapped: 5, removable tiebolts to strengthen theheadstock at its gap: 6, the driving face-plates on the ends of thearbor: 7 the car axle: 8, the car wheels thereon: 9, the journal-ends ofthe car axle projecting outwardly beyond the wheels: 10, the twotailstocks, hereafter described in the singular: 11, a large hollowjournal in the tailstock, the tailstock bearing for this spindle beinglongitudinally split to permit the taking up of wear, and the inner endof the spindle having a tapering bore with walls converging outwardly oraway from Specification of Letters Patent.

Application filed November 13, 1909.

Patented Mar. 15, 1910.

Serial No. 527,766.

the car wheel: 12, bolts at the split of the tail-stock bearing toprovide for taking up the wear: 13, a split collet fitting the taperingbore of the spindle: 14, segmental pads adapted to fit the journals ofthe car axle and to fit within the cylindrical bore of the collet; 15, ascrew journaled in the outer end of the spindle and threaded into thecollet to adjust the collet endwise in the spindle: 16, a hand-wheel foroperating the screw: 17, a gap in the rear side of the inner end of thetail-stock bearing, this gap being of such horizontal length andvertical width as to permit the transverse entrance of the journal ofthe car axle: 1.8, the drivers by which the face-plates drive the carwheels: 19, the driving gear on the arbor, gapped and provided with aremovable patch at the gap as usual: 20, a rack formed on spindle 11,each tooth of the rack extending circumferentially around the spindle:21, a pinion journaled in the tailstock and engaging this gear; and 22,a hand-wheel connected with the pinion and serving in moving the spindleendwise in the tailstock.

Assume the lathe to be empty; the tiebolts 5 removed; the patch removedfrom the gap of the driving gear; the arbor in such angular positionthat its gap will coincide with the gap in the headstock; spindles 11retracted so far outwardly that their inner ends will be at about theouter margins of the gaps 17 in the tailstocks; the collets adjusted sofar inwardly as to be in fairly expanded condition; and pads 14 removedfrom the collets. The wheel and axle structure is now to be inserted inthe lathe, the body of the axle passing into the arbor through the gapsin the headstock, the driving gear, the arbor, and the face-plates, andthe axle journals with the pads upon them passing through the gaps 17 inthe tailstocks. The spindles are now to be moved inwardly, by actuatingthe hand-wheels 22, till the bores of the collets inclose the pads. Thecollets are now to be moved outwardly, by actuating hand-wheels 16 tillthe axle journals become firmly chucked in the spindles. This leaves thewheel-and-axle structure centered and firmly supported in thetailstocks, the spindles forming artificial journals,- so to speak, forthe axle. The patch-block is now to be replaced in the driving gear, tiebolts 5 replaced, the drivers adjusted for their work, and everything isready for the operation of the lathe in turning the car wheels in theusual manner. WVhen the work is done the wheel-and-axlestructure is tobe removed by a method substantially the opposite of that which has beendescribed in connection with the placing of the work in the lathe.

It is to be observed that the system provides substantial journalsupport for the axle close up to the car wheels in a manner consistentwith the taking of heavy cuts on the car wheels; that no shifting of thetailstocks is required in placing and removing the wheel-and-axlestructures; that no opening of the tailstock bearings is necessary inplacing and removing the work; and that while the work is being donethere is no wear on the axle journals, the work at the same time beingaccurately centered by those journals. It is to be observed thatoperation on the work produces no end thrusts on the tail-stocks ortheir parts, these thrusts being taken care of by the headstock drivers.

\Ve claim 1. A car wheel lathe comprising, a gapped headstock providedwith a gapped arbor and driving apparatus, a pair of tailstocks havingbearings gapped for the transverse passage of the axle-journals, aspindle journaled in each tail-stock and longitudinally movable therein,a chuck carried by the inner end of each spindle and adapted forengagement with the axle-journals, means for operating the chucks, andmeans for moving the spindles endwise, combined substan tially as setforth.

2. A car wheel lathe comprising,- a gapped headstock provided with agapped arbor and driving apparatus, a pair of tailstocks having bearingsgapped for the transverse passage of the axle-journals, a spindlejournaled in each tailstock and longitudinally movable therein, a chuckcarried by the inner end of each spindle and adapted for engagement withthe axle-journals, means for operating the chucks, endless rack teethextending circumferentially around the spindles, a pinion journaled ineach tailstock and engaging the rack teeth of the appropriate spindle,and means for turning the pinions, combined substantially as set forth.

3. A car wheel lathe comprising, a gapped headstock provided with agapped arbor and driving apparatus, a pair of tailstocks having splitbearings gapped for the transverse passage of the axle-journals,tightening bolts at the split portions of said bearings, a spindlejournaled in each tailstock and longitudinally movable therein, a chuckcarried by the inner end of each spindle and adapted for engagement withthe axle-journals, means for operating the chucks, and means for movingthe spindles endwise, combined substantially as set forth.

4. A car wheel lathe comprising, a gapped headstock provided with agapped arbor and driving apparatus, a pair of tailstocks having bearingsgapped for the transverse passage of the axle-journals, a spindle journaled in each tail-stock and longitudinally movable therein andhaving its inner end provided with a tapering bore, a split colletfitted in each spindle, a screw journaled in each spindle and engagingits collet to serve in adjusting the collet endwise, and means formoving the spindles endwise, combined substantially as set forth.

5. A car wheel lathe comprising, a gapped headstock provided with agapped arbor and driving apparatus, a pair of tailstocks having bearingsgapped for the transverse passage of the axle-journals, a spindlejournaled in each tail-stock and longitudinally movable therein andhaving its inner end provided with a tapering bore,- a split colletfitted in each spindle, a screw journaled in each spindle and engagingits collet to serve in adjusting the collet endwise, segmental padsfitting the bore of the collets and adapted to engage the axle-journals,and means for moving the spindle endwise, combined substantially as setforth.

ALBERT G. STEBBINS. XVILLARD T; SEARS. itnesses J.- T. W. MURRAY, C. W.BEITER.

